Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]

Q. Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]

[a] : The short term mass irregularity of rotor yarn is less than that of ring yarn.

[r] : Rotor yarn has belt or wrapper fibres, but ring yarn does not.

 (A) Both [a] and [r] are true and [r] is the correct reason for [a]

 (B) Both [a] and [r] are true but [r] is not the correct reason for [a]

(C) Both [a] and [r] are false

 (D) [a] is true but [r] is false

Ans: Both [a] and [r] are true but [r] is not the correct reason for [a]